Fast Charging Is Confusing — Let's Fix That
Walk into any electronics store and you'll see chargers advertising USB PD, PPS, GaN, Quick Charge, and more. It's a lot of jargon. But understanding these terms is actually straightforward — and it'll help you choose the right charger and get the fastest possible speeds from your devices.
USB Power Delivery (USB PD): The Universal Fast Charging Standard
USB Power Delivery is the most important fast-charging protocol to understand. Developed by the USB Implementers Forum, USB PD is an open standard that allows chargers and devices to negotiate the optimal voltage and current for the fastest safe charging.
Key facts about USB PD:
- Supports up to 240W (USB PD 3.1) — enough to charge high-performance laptops
- Works over USB-C cables
- Supported by Apple, Samsung, Google, Dell, HP, Lenovo, and virtually all modern device makers
- Allows bidirectional power flow — some devices can charge others
If your charger doesn't support USB PD, it cannot fast-charge most modern laptops and will charge phones at reduced speeds.
Programmable Power Supply (PPS): The Next Level
PPS is an extension of USB PD that allows even finer control over voltage and current. While standard USB PD negotiates in fixed voltage steps, PPS adjusts continuously in small increments — delivering exactly the right power at every stage of the charging cycle.
The result: faster charging with less heat. PPS is supported by Samsung Galaxy phones, Google Pixel devices, and many Android flagships. It's increasingly common in premium chargers.
GaN: The Hardware That Makes It All Work Better
USB PD and PPS are software protocols — they define how power is negotiated. GaN (Gallium Nitride) is the hardware technology that makes delivering that power efficiently possible.
A GaN charger can support both USB PD and PPS while running cooler and in a smaller form factor than a traditional silicon charger. Think of GaN as the engine and USB PD/PPS as the transmission — you need both working together for peak performance.
Our NexCharger 65W GaN Charger supports USB PD 3.0 and is engineered to deliver maximum protocol-compliant speeds to every connected device.
What About Qualcomm Quick Charge?
Quick Charge is Qualcomm's proprietary fast-charging protocol, used in many Android phones with Snapdragon processors. While it's not the same as USB PD, many modern chargers support both — so you get fast charging regardless of which protocol your device uses.
Choosing the Right Charger for Your Protocol
Here's a quick reference:
- iPhone 15+, MacBook, iPad Pro — USB PD required; 30W+ recommended
- Samsung Galaxy S-series — USB PD + PPS for maximum speed
- Google Pixel — USB PD + PPS
- Windows laptops — USB PD 3.0, 65W–140W depending on model
For international travelers, our NexCharger GaN 20W Travel Adapter delivers USB PD fast charging in any country — no separate adapter needed.
For a deeper look at how GaN hardware enables these protocols, read our article on What is GaN Charging Technology.
The Bottom Line
USB PD is the standard you need. PPS is the upgrade that makes it even better. GaN is the technology that delivers both efficiently. Together, they represent the current state of the art in fast charging — and NexCharger is built around all three.
For technical deep dives on charging protocols, USB.org publishes the official specifications, and Android Authority covers real-world protocol performance testing.